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| <div class="lw-box__hd"> | | <div class="lw-box__hd"> |
| <div class="lw-box__title">Introduction</div> | | <div class="lw-box__title">Introduction</div> |
| <div class="lw-box__link">[[Cannabis botany]]</div> | | <div class="lw-box__link">[[Cannabis Botany]]</div> |
| </div> | | </div> |
| <div class="lw-box__bd"> | | <div class="lw-box__bd"> |
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| <div class="lw-hero__text"> | | <div class="lw-hero__text"> |
| <p>'''Cannabis botany''' examines the plant biology of ''Cannabis sativa'' L., covering morphology, physiology, reproductive biology, chemical ecology, and environmental adaptation. As one of humanity's oldest cultivated plants, cannabis exhibits remarkable diversity in growth patterns, chemical profiles, and ecological adaptations across traditional growing regions.</p> | | <p>'''Cannabis botany''' examines the plant biology of ''Cannabis sativa'' L., covering morphology, physiology, reproductive biology, chemical ecology and environmental adaptation. As one of humanity's oldest cultivated plants, cannabis exhibits remarkable diversity in growth patterns, chemical profiles and ecological adaptations across traditional growing regions.</p> |
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| <p>Cannabis is a dioecious annual herb in the family Cannabaceae, characterized by palmate leaves with serrated leaflets, pistillate and staminate flowers on separate plants, and dense resinous trichomes producing cannabinoids and terpenes. The species shows extraordinary morphological variation—from compact highland varieties adapted to short growing seasons to tall tropical cultivars flowering under equatorial photoperiods.</p> | | <p>Cannabis is a [[Dioecy|dioecious]] annual herb in the family [[Cannabaceae]], characterized by palmate leaves with serrated leaflets, pistillate and staminate flowers on separate plants and dense resinous [[Trichome types|trichomes]] producing [[Cannabinoid profiles|cannabinoids]] and [[Terpene profiles|terpenes]]. The species shows extraordinary morphological variation, from compact highland varieties adapted to short growing seasons to tall tropical cultivars flowering under equatorial photoperiods.</p> |
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| <p>Key botanical themes include photoperiod response and flowering triggers, trichome development and cannabinoid biosynthesis, population genetics and local adaptation, life cycle phenology across climates, and the relationship between environmental conditions and chemical profiles. Modern cannabis botany integrates classical morphological description with molecular genetics, phytochemistry, and population biology to document and preserve genetic diversity.</p> | | <p>Key botanical themes include [[Photoperiod response|photoperiod response]] and flowering triggers, [[Trichome development|trichome development]] and [[Resin|resin]] production, [[Phenotypic plasticity|phenotypic plasticity]] and [[Climate adaptation in cannabis|climate adaptation]], life cycle [[Phenology|phenology]] across climates and the relationship between environmental conditions and [[Chemotype|chemical profiles]].</p> |
| </div> | | </div> |
| </div> | | </div> |
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| <div class="featured-article"> | | <div class="featured-article"> |
| <div class="featured-article__content"> | | <div class="featured-article__content"> |
| <p>'''Capitate-stalked trichomes''' are the primary site of cannabinoid and terpene biosynthesis in cannabis. These specialized epidermal structures feature a multicellular stalk topped by a secretory head composed of disc cells that synthesize and accumulate cannabinoids, terpenes, and flavonoids in a subcuticular storage cavity. Trichome density varies dramatically between landrace populations, correlating with environmental pressures such as UV radiation intensity, herbivory pressure, and water stress.</p> | | <p>'''[[Capitate-stalked trichomes]]''' are the primary site of cannabinoid and terpene biosynthesis in cannabis. These specialized epidermal structures feature a multicellular stalk topped by a secretory head composed of disc cells that synthesize and accumulate cannabinoids, terpenes and flavonoids in a subcuticular storage cavity. Trichome density varies dramatically between [[Landrace cannabis|landrace]] populations, correlating with environmental pressures such as UV radiation intensity, [[Herbivory and defence|herbivory]] pressure and water stress.</p> |
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| <p>Highland varieties from regions like the Hindu Kush and Western Himalayas often display exceptionally dense trichome coverage with high resin production, reflecting adaptation to intense solar radiation at high elevations. Lowland tropical varieties may show sparser but larger trichomes optimized for different environmental conditions. The chemical profile of trichome secretions also varies regionally—some populations produce predominantly THC, others CBD, while many landrace varieties maintain balanced cannabinoid ratios reflecting thousands of years of selection for traditional uses.</p> | | <p>Highland varieties from regions like the Hindu Kush and Western Himalayas often display exceptionally dense trichome coverage with high [[Resin|resin]] production, reflecting [[Climate adaptation in cannabis|adaptation]] to intense solar radiation at high elevations. Lowland tropical varieties may show sparser but larger trichomes optimized for different environmental conditions. The chemical profile of trichome secretions also varies regionally: some populations produce predominantly THC, others CBD, while many landrace varieties maintain balanced [[Cannabinoid profiles|cannabinoid ratios]] reflecting thousands of years of selection for traditional uses.</p> |
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| <p>([[Capitate-stalked trichomes|Full article...]])</p> | | <p>([[Capitate-stalked trichomes|Full article...]])</p> |
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| <div class="lw-box__bd"> | | <div class="lw-box__bd"> |
| <ul> | | <ul> |
| <li>...that cannabis plants can produce over '''200 different terpene compounds''', creating distinct regional "chemotypes" that traditional farmers recognize by scent alone?</li> | | <li>...that cannabis is one of the few [[Dioecy|dioecious]] annual crop plants, meaning every seed is the product of outcrossing between genetically distinct male and female parents?</li> |
| <li>...that some highland landrace varieties complete their entire lifecycle in as little as '''75 days''', while equatorial sativas may require '''20+ weeks''' of flowering?</li> | | <li>...that [[Pollination biology|wind-borne cannabis pollen]] has been documented travelling several kilometres, making genetic isolation of landrace populations from nearby hybrid crops extremely difficult?</li> |
| <li>...that cannabis seeds can remain viable in soil seed banks for over a '''decade''', allowing population recovery after disturbance or eradication?</li> | | <li>...that some highland [[Autoflowering|autoflowering]] varieties complete their entire lifecycle in as little as '''75 days''', while equatorial sativas may require '''20+ weeks''' of flowering?</li> |
| <li>...that traditional fiber landraces can reach heights exceeding '''5 meters''' with minimal branching, while drug cultivars remain compact and highly branched?</li> | | <li>...that cannabis exhibits extreme [[Phenotypic plasticity]], with genetically identical clones producing dramatically different [[Chemotype|chemotypes]] under different environmental conditions?</li> |
| <li>...that wild cannabis populations in Central Asia show '''greater genetic diversity''' than all cultivated varieties combined?</li> | | <li>...that the [[Resin|resin]] produced by cannabis trichomes likely evolved as a defence against UV radiation, herbivores and desiccation rather than for any purpose related to human use?</li> |
| <li>...that leaflet number (typically 5-9) varies between regional populations and '''correlates with latitude''' of origin?</li>
| | <li>...that [[Polyploidy|tetraploid]] cannabis populations have been documented growing at altitudes above 3,000 m in the Lahaul-Spiti cold desert of the Indian Himalayas?</li> |
| </ul> | | </ul> |
| </div> | | </div> |
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| [[File:Cannabis-leaf-morphology.jpg|800px|link=]] | | [[File:Cannabis-leaf-morphology.jpg|800px|link=]] |
| </div> | | </div> |
| <div class="lw-hero__caption">Leaf morphology variation across landrace populations, showing differences in leaflet number, serration depth, and overall form</div> | | <div class="lw-hero__caption">[[Leaf morphology]] variation across landrace populations, showing differences in leaflet number, serration depth and overall form</div> |
| </div> | | </div> |
| </div> | | </div> |
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| <dl> | | <dl> |
| | <dt>Taxonomy & Classification</dt> |
| | <dd>[[Cannabis sativa]] · [[Cannabaceae]] · [[Cannabis taxonomy]] · [[Sativa vs Indica]] · [[NLD/BLD classification]] · [[Cannabis ruderalis]] · [[Cultivar]] · [[Landrace cannabis]] · [[Cannabis use types]] · [[Feral and ruderal cannabis]] · [[Phylogenetics of Cannabis]]</dd> |
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| <dt>Plant Morphology</dt> | | <dt>Plant Morphology</dt> |
| <dd>[[Height variation]] · [[Growth patterns]] · [[Branching morphology]] · [[Leaf morphology]] · [[Leaflet count]] · [[Serration patterns]] · [[Stem thickness]] · [[Internode length]] · [[Root architecture]]</dd> | | <dd>[[Growth patterns]] · [[Branching morphology]] · [[Leaf morphology]] · [[Stem morphology]] · [[Seed morphology]] · [[Root architecture]] · [[Fiber morphology]]</dd> |
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| <dt>Flowering Biology</dt> | | <dt>Reproductive Biology</dt> |
| <dd>[[Photoperiod response]] · [[Short-day flowering]] · [[Flowering time]] · [[Sex expression]] · [[Male plants]] · [[Female plants]] · [[Hermaphroditism]] · [[Inflorescence morphology]] · [[Seed production]]</dd> | | <dd>[[Dioecy]] · [[Sex expression]] · [[Hermaphroditism]] · [[Pollination biology]] · [[Inflorescence morphology]] · [[Vegetative propagation]]</dd> |
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| | <dt>Life Cycle & Phenology</dt> |
| | <dd>[[Cannabis life cycle]] · [[Photoperiod response]] · [[Autoflowering]] · [[Flowering time]] · [[Phenology]]</dd> |
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| <dt>Trichome Biology</dt> | | <dt>Trichome Biology</dt> |
| <dd>[[Capitate-stalked trichomes]] · [[Capitate-sessile trichomes]] · [[Bulbous trichomes]] · [[Trichome density]] · [[Trichome development]] · [[Regional trichome variation]]</dd> | | <dd>[[Resin]] · [[Capitate-stalked trichomes]] · [[Trichome types]] · [[Trichome development]]</dd> |
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| <dt>Phytochemistry</dt> | | <dt>Chemical Ecology</dt> |
| <dd>[[Cannabinoid biosynthesis]] · [[THC biosynthesis]] · [[CBD biosynthesis]] · [[Terpene biosynthesis]] · [[Cannabinoid profiles]] · [[Terpene profiles]] · [[Chemotype stability]] · [[Regional chemotypes]]</dd> | | <dd>[[Secondary metabolites]] · [[Chemotype]] · [[Cannabinoid profiles]] · [[Terpene profiles]]</dd> |
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| | <dt>Ecology</dt> |
| | <dd>[[Cannabis ecology]] · [[Herbivory and defence]] · [[Pathogens and disease]]</dd> |
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| <dt>Environmental Adaptation</dt> | | <dt>Environmental Adaptation</dt> |
| <dd>[[Tropical adaptation]] · [[Subtropical adaptation]] · [[Temperate adaptation]] · [[Montane adaptation]] · [[Altitude responses]] · [[Temperature tolerance]] · [[Drought tolerance]] · [[Monsoon adaptation]] · [[Soil adaptation]]</dd> | | <dd>[[Phenotypic plasticity]] · [[Climate adaptation in cannabis]] · [[Abiotic stress tolerance]] · [[Epigenetics in cannabis]] · [[Soil adaptation]]</dd> |
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| <dt>Regional Ecotypes</dt>
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| <dd>[[Thai varieties]] · [[Indian varieties]] · [[Nepali varieties]] · [[Afghan varieties]] · [[Moroccan varieties]] · [[Mexican varieties]] · [[Colombian varieties]] · [[Malawian varieties]]</dd>
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| <dt>Traditional Cultivar Types</dt>
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| <dd>[[Ganja cultivation]] · [[Charas production types]] · [[Bhang preparation types]] · [[Hemp cultivation]] · [[Fiber morphology]] · [[Dual-purpose varieties]] · [[Feral cannabis]] · [[Wild populations]]</dd>
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| <dt>Life Cycle & Phenology</dt> | | <dt>Population Biology</dt> |
| <dd>[[Seed germination]] · [[Vegetative growth]] · [[Floral initiation]] · [[Flowering duration]] · [[Senescence]] · [[Seasonal calendars]] · [[Regional planting times]] · [[Harvest timing]]</dd> | | <dd>[[Terroir in Cannabis]] · [[Polyploidy]] · [[Centre of origin]] · [[Gene pool]] · [[Genetic diversity]] · [[Local adaptation]] · [[Natural selection]] · [[Mass selection]] · [[Genetic drift]] · [[Gene flow]] · [[Introgression]] · [[Genetic contamination]] · [[Genetic erosion]]</dd> |
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| <dt>Population Genetics</dt>
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| <dd>[[Gene pools]] · [[Regional populations]] · [[Local adaptation]] · [[Genetic diversity]] · [[Natural selection]] · [[Farmer selection]] · [[Genetic drift]] · [[Gene flow]] · [[Genetic pollution]] · [[Hybridization]] · [[Introgression]]</dd>
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| <dt>Documentation Methods</dt>
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| <dd>[[Field photography]] · [[Plant photography]] · [[Morphometric analysis]] · [[GPS documentation]] · [[Chemical analysis]] · [[Cannabinoid testing]] · [[Terpene testing]] · [[Traditional knowledge recording]]</dd>
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| </dl> | | </dl> |
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| <ul class="lw-list"> | | <ul class="lw-list"> |
| <li>'''Document morphology''': Add detailed plant descriptions with precise measurements</li> | | <li>'''Document morphology''': Add detailed plant descriptions with measurements to [[Growth patterns]], [[Leaf morphology]], [[Branching morphology]]</li> |
| <li>'''Upload field photos''': Share diagnostic images showing leaves, flowers, stems, habitat</li> | | <li>'''Upload field photos''': Share diagnostic images showing leaves, flowers, trichomes, habitat</li> |
| <li>'''Record phenology''': Document flowering times, seasonal patterns, life cycle events</li> | | <li>'''Record phenology''': Document [[Flowering time|flowering times]], seasonal patterns, life cycle events across growing regions</li> |
| <li>'''Describe chemotypes''': Add terpene profiles, cannabinoid ratios, chemical variation</li> | | <li>'''Describe chemotypes''': Add [[Terpene profiles|terpene profiles]], [[Cannabinoid profiles|cannabinoid ratios]], [[Chemotype|chemical variation]] data</li> |
| <li>'''Map distributions''': Record geographic ranges, altitude patterns, climate zones</li> | | <li>'''Write new articles''': [[Dioecy]], [[Pollination biology]], [[Phenotypic plasticity]], [[Cannabis sativa]], [[Sativa vs Indica]]</li> |
| <li>'''Expand stubs''': [[Serration patterns]], [[Pistillate flowers]], [[Seed viability]]</li> | | <li>'''Expand stubs''': [[Cannabis ecology]], [[Resin]], [[Seed morphology]], [[Autoflowering]]</li> |
| </ul> | | </ul> |
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| </div> | | </div> |
| <div class="lw-box__bd"> | | <div class="lw-box__bd"> |
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| | [[:Category:Botany|Botany]] · [[:Category:Cannabis Taxonomy|Taxonomy]] · [[:Category:Plant Morphology|Morphology]] · [[:Category:Reproductive Biology|Reproduction]] · [[:Category:Life Cycle and Phenology|Life Cycle]] · [[:Category:Trichome Biology|Trichomes]] · [[:Category:Chemical Ecology|Chemical Ecology]] · [[:Category:Cannabis Ecology|Ecology]] · [[:Category:Environmental Adaptation|Adaptation]] · [[:Category:Population Biology|Population Biology]] |
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| </div> | | </div> |
